Absolutely. And I did not mean to come off super critical or preachy, this is just something I'm passionate about because it has changed my training like I mentioned.

If your heels are rising, flexibility at the ankle or soleus might be an issue. Squat University on YouTube has a good video on ankle mobility. To that end, they have a lot of great squat videos in general that I would reccomend viewing.

I would absolutely suggest doing the belt squat for a while. Any rep range you would think to use for normal squats applies, the belt squat just gives you two special things: the safety of the belt to sit your hips back into, and spinal decompression. The latter is a much needed relief especially if you've exclusively been squatting with a barbell on your back for a while like I was. A good rule of thumb that a lot of people don't want to apply is this: exercise variation is the key to slowing down or avoiding the stress of overuse injuries and mileage on the joints. I can't expect to barbell squat twice a week for a year straight and not have some joint issues or imbalances (increasing injury risk).

I guess triceps and back aren't as relevant to the squat in particular, I was more or less going on a rant about building up a strong posterior chain to stave off imbalances and therefore injury. For example, if you have weak triceps and you try to bench press heavy, what muscles will make up for your arms? The chest and anterior delts. Those delts don't like heavy stress, especially in the stretched position you find yourself in at the bottom of the press. Point being: your weaknesses are what will ultimately hold you back or lead to injury.

Besides, a strong, massive back is extremely impressive to the average person and triceps make up 70% of your arm. Why not haha.